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Side by Side Diff: runtime/vm/intermediate_language_arm64.cc

Issue 1812753002: - Move (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Created 4 years, 9 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_ARM64. 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_ARM64.
6 #if defined(TARGET_ARCH_ARM64) 6 #if defined(TARGET_ARCH_ARM64)
7 7
8 #include "vm/intermediate_language.h" 8 #include "vm/intermediate_language.h"
9 9
10 #include "vm/compiler.h" 10 #include "vm/compiler.h"
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2577 } 2577 }
2578 2578
2579 2579
2580 class CheckStackOverflowSlowPath : public SlowPathCode { 2580 class CheckStackOverflowSlowPath : public SlowPathCode {
2581 public: 2581 public:
2582 explicit CheckStackOverflowSlowPath(CheckStackOverflowInstr* instruction) 2582 explicit CheckStackOverflowSlowPath(CheckStackOverflowInstr* instruction)
2583 : instruction_(instruction) { } 2583 : instruction_(instruction) { }
2584 2584
2585 virtual void EmitNativeCode(FlowGraphCompiler* compiler) { 2585 virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
2586 if (FLAG_use_osr && osr_entry_label()->IsLinked()) { 2586 if (FLAG_use_osr && osr_entry_label()->IsLinked()) {
2587 uword flags_address = Isolate::Current()->stack_overflow_flags_address();
2588 const Register value = instruction_->locs()->temp(0).reg(); 2587 const Register value = instruction_->locs()->temp(0).reg();
2589 __ Comment("CheckStackOverflowSlowPathOsr"); 2588 __ Comment("CheckStackOverflowSlowPathOsr");
2590 __ Bind(osr_entry_label()); 2589 __ Bind(osr_entry_label());
2591 if (FLAG_allow_absolute_addresses) { 2590 __ LoadImmediate(value, Thread::kOsrRequest);
2592 __ LoadImmediate(TMP, flags_address); 2591 __ str(value, Address(THR, Thread::stack_overflow_flags_offset()));
2593 __ LoadImmediate(value, Isolate::kOsrRequest);
2594 __ str(value, Address(TMP));
2595 } else {
2596 __ LoadIsolate(TMP);
2597 __ LoadImmediate(value, Isolate::kOsrRequest);
2598 __ str(value, Address(TMP, Isolate::stack_overflow_flags_offset()));
2599 }
2600 } 2592 }
2601 __ Comment("CheckStackOverflowSlowPath"); 2593 __ Comment("CheckStackOverflowSlowPath");
2602 __ Bind(entry_label()); 2594 __ Bind(entry_label());
2603 compiler->SaveLiveRegisters(instruction_->locs()); 2595 compiler->SaveLiveRegisters(instruction_->locs());
2604 // pending_deoptimization_env_ is needed to generate a runtime call that 2596 // pending_deoptimization_env_ is needed to generate a runtime call that
2605 // may throw an exception. 2597 // may throw an exception.
2606 ASSERT(compiler->pending_deoptimization_env_ == NULL); 2598 ASSERT(compiler->pending_deoptimization_env_ == NULL);
2607 Environment* env = compiler->SlowPathEnvironmentFor(instruction_); 2599 Environment* env = compiler->SlowPathEnvironmentFor(instruction_);
2608 compiler->pending_deoptimization_env_ = env; 2600 compiler->pending_deoptimization_env_ = env;
2609 compiler->GenerateRuntimeCall(instruction_->token_pos(), 2601 compiler->GenerateRuntimeCall(instruction_->token_pos(),
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2631 private: 2623 private:
2632 CheckStackOverflowInstr* instruction_; 2624 CheckStackOverflowInstr* instruction_;
2633 Label osr_entry_label_; 2625 Label osr_entry_label_;
2634 }; 2626 };
2635 2627
2636 2628
2637 void CheckStackOverflowInstr::EmitNativeCode(FlowGraphCompiler* compiler) { 2629 void CheckStackOverflowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
2638 CheckStackOverflowSlowPath* slow_path = new CheckStackOverflowSlowPath(this); 2630 CheckStackOverflowSlowPath* slow_path = new CheckStackOverflowSlowPath(this);
2639 compiler->AddSlowPathCode(slow_path); 2631 compiler->AddSlowPathCode(slow_path);
2640 2632
2641 if (compiler->is_optimizing() && FLAG_allow_absolute_addresses) { 2633 __ ldr(TMP, Address(THR, Thread::stack_limit_offset()));
2642 __ LoadImmediate(TMP, Isolate::Current()->stack_limit_address());
2643 __ ldr(TMP, Address(TMP));
2644 } else {
2645 __ LoadIsolate(TMP);
2646 __ ldr(TMP, Address(TMP, Isolate::stack_limit_offset()));
2647 }
2648 __ CompareRegisters(SP, TMP); 2634 __ CompareRegisters(SP, TMP);
2649 __ b(slow_path->entry_label(), LS); 2635 __ b(slow_path->entry_label(), LS);
2650 if (compiler->CanOSRFunction() && in_loop()) { 2636 if (compiler->CanOSRFunction() && in_loop()) {
2651 const Register temp = locs()->temp(0).reg(); 2637 const Register temp = locs()->temp(0).reg();
2652 // In unoptimized code check the usage counter to trigger OSR at loop 2638 // In unoptimized code check the usage counter to trigger OSR at loop
2653 // stack checks. Use progressively higher thresholds for more deeply 2639 // stack checks. Use progressively higher thresholds for more deeply
2654 // nested loops to attempt to hit outer loops with OSR when possible. 2640 // nested loops to attempt to hit outer loops with OSR when possible.
2655 __ LoadObject(temp, compiler->parsed_function().function()); 2641 __ LoadObject(temp, compiler->parsed_function().function());
2656 intptr_t threshold = 2642 intptr_t threshold =
2657 FLAG_optimization_counter_threshold * (loop_depth() + 1); 2643 FLAG_optimization_counter_threshold * (loop_depth() + 1);
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5685 1, 5671 1,
5686 locs()); 5672 locs());
5687 __ Drop(1); 5673 __ Drop(1);
5688 __ Pop(result); 5674 __ Pop(result);
5689 } 5675 }
5690 5676
5691 5677
5692 } // namespace dart 5678 } // namespace dart
5693 5679
5694 #endif // defined TARGET_ARCH_ARM64 5680 #endif // defined TARGET_ARCH_ARM64
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